SYMPOSIA PAPER Published: 01 January 1983
STP33496S

A Microcosm Study of Lindane and Naphthalene for Model Validation

Source

Lindane and naphthalene were used in a series of flow-through microcosms to validate predictions of two environmental fate models—the exposure analysis modeling system (EXAMS) and simplified lake and stream analysis (SLSA). The microcosms' physical transport characteristics were carefully measured and used as input parameters to the models, along with laboratory data on lindane and naphthalene rate constants and coefficients. The results show that both models accurately predict the chemicals' concentrations in the water compartment. Observed concentrations in the sediments were two to three orders of magnitude lower than the models' predictions, even though the overall mass balance accounted for about 90% of the chemicals' input. Lack of agreement between observed and predicted sediment concentrations may be attributed to (a) the variability of the sediment partition coefficient values, (b) the slow rate of sediment loading, (c) vertical stratification of the chemicals in the sediment, and (d) microbial degradation of the chemicals in the sediment.

Author Information

Staples, CA
Institute of Applied Sciences and Department of Biological Sciences, North Texas State University, Denton, TX
Dickson, KL
Institute of Applied Sciences and Department of Biological Sciences, North Texas State University, Denton, TX
Saleh, FY
Institute of Applied Sciences and Department of Biological Sciences, North Texas State University, Denton, TX
Rodgers, JH
Institute of Applied Sciences and Department of Biological Sciences, North Texas State University, Denton, TX
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E47
Pages: 26–41
DOI: 10.1520/STP33496S
ISBN-EB: 978-0-8031-4868-0
ISBN-13: 978-0-8031-0255-2